EP2065913B1 - Thermal trip device for electrical line-protection device - Google Patents

Thermal trip device for electrical line-protection device Download PDF

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Publication number
EP2065913B1
EP2065913B1 EP08305864A EP08305864A EP2065913B1 EP 2065913 B1 EP2065913 B1 EP 2065913B1 EP 08305864 A EP08305864 A EP 08305864A EP 08305864 A EP08305864 A EP 08305864A EP 2065913 B1 EP2065913 B1 EP 2065913B1
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EP
European Patent Office
Prior art keywords
bimetal
thermal
convection means
trip device
conductor
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EP08305864A
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German (de)
French (fr)
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EP2065913A1 (en
Inventor
Claudia Dietrich
Stéphane Eloy
Nikola Puh
Sabine Siegel
David Weil
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Hager Electro SAS
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Hager Electro SAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/164—Heating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms

Definitions

  • the invention relates more particularly to small circuit breakers, for which the thermal devices are generally constituted by a bimetallic strip without current flow, and a heating wire wound around the bimetallic strip and traversed by the current of the line.
  • the heating wire makes it possible to use a bimetallic thick enough to develop the force required to trigger the mechanism for opening and closing contacts.
  • This structure also offers a remarkable compactness, because the heating wire is directly wound around the bimetallic strip, and does not occupy a specific space in the vicinity of it.
  • the heating wire having a high impedance in particular due to its small section, it quickly reaches its melting temperature when it is crossed by high currents, for example in case of short circuit. This is a disadvantageous limitation if the breaking power sought for the electrical apparatus is high. Moreover, such a solution is not favorable in terms of industrialization in the case of manual manufacture, because it requires soldering the heating wire.
  • the present invention proposes to overcome these disadvantages, while maintaining the aforementioned advantages.
  • the configuration implemented in the context of the present invention has a robustness and compactness of the same order as those conferred by the heating wire solution, while at the same time significantly improving the breaking strength. .
  • the thermal subassembly of the invention comprises a bimetallic strip and thermal convection means traversed by the current carried on a line, the bimetallic strip and the thermal convection means being arranged in the casing so that the bimetal is in the heat flow emitted by the convection means.
  • the objective of the invention is to optimize the configurations obeying this principle.
  • the thermal tripping device of the invention is characterized in that the thermal convection means consist of a conductive sheet metal conductor cut and folded according to a geometry intended to make the length of the conductor largest possible in a given space, said conductor being placed in front and near the bimetallic strip.
  • One of the basic ideas of the invention is, at the same time as providing indirect heating of the bimetal, to increase the impedance of the medium. heating, hence the increase in the length of the conductor, which leads to protect the bimetallic and corollary to increase the possibilities of choice for it: it can in particular be chosen higher impedance, then having a deflection specific more important than in a traditional architecture.
  • the device is also made more limiting, which leads to reduce thermal stress during cuts and to further preserve the bimetallic strip.
  • the length of the thermal convection means takes part, on the one hand, in one of the initial objectives of the system of the invention, namely the heating of the surrounding air so as to have a correct impact on the bimetallic strip, and on the other hand part plays a role in the control of impedance, and consequently the power of cutoff.
  • the thermal convection means consist of a central portion of plane shape located opposite the bimetal and two end lugs respectively connected to a braid from the bimetal and one end of the wound conductor.
  • the central portion is in the form of an elongated aliasing.
  • the thermal convection means are placed in series with the bimetallic strip.
  • thermal convection means and the bimetal can be placed in parallel.
  • the relative disposition of the convection means and the bimetallic strip in space must be such that said bimetal strip can be heated by the circulation of the heated air obtained using the convection means.
  • the thermal convection means and the bimetallic strip, forming an assembly are in practice connected between a terminal of one of the connection devices to a line and one of the fixed or mobile contacts.
  • the bimetal is welded to said terminal, the free end of said bimetal strip being connected to the thermal convection means by a conductive braid, an end lug of the convection means being welded to the coil.
  • the thermal convection means are preferably housed in a portion of the insulating housing of the electrical apparatus provided with walls delimiting a restricted space favoring the heating of the bimetal by convection.
  • bimetal (1) is welded to a terminal (2) at one of its ends.
  • the other end is connected by means of a braid (3) to an end lug (4) of a convector (5) whose other end is equipped with a second lug (6) allowing its connection to the coil (7) of a magnetic subassembly, equipped at the output of a fixed contact (8).
  • This assembly which integrates the thermal function and the magnetic function, is intended to equip a circuit breaker as shown in FIG. figure 2 .
  • the terminal (2) cooperates in this case with a cage connection device (9) and screw (10). It slides in the cage (9 in the direction of the axis of rotation of the screw (10) .
  • the assembly consisting of the bimetallic strip (1), the braid (3), the end lugs (4, 6) and the convector (5) is disposed in an area of the housing (B) providing a relatively confined space for convection of air, which space is schematically represented by the hatching (11)
  • the magnetic subassembly (12) besides participating in this confinement, on the right of the device of the invention.
  • the air heated by the convector, circulating in this zone, makes it possible to raise the temperature of the bimetallic strip (1), so that it undergoes a deflection enabling it to act on the latch release mechanism of the circuit breaker.
  • the geometric configuration of the convection means, as appearing in figure 1 is, for example, the following one: an elongated aliasing (5), arranged in front of the bimetallic strip (1), allows a production of heat directly impacting said bimetallic strip (1).
  • the convector (5) located near the bimetallic strip (1), heats the ambient air and therefore indirectly heats the bimetallic strip (1).
  • the compactness of the convection means (5) is in particular obtained by this planar geometry, which can then be easily integrated into the thickness of the circuit breaker (see FIG. figure 2 ). This geometry favors heat exchanges with the ambient air. Such a geometry can finally have a direct impact on the heat production of the convector (5), since it allows to easily adjust the length thereof.
  • the section of the latter is calculated as a function of the nature of the material. Once this minimum section is obtained, the heat production can be controlled by adjusting the length of the convector (5).

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Abstract

The device has a lock mechanism opening and closing a fixed contact (8) and mobile contact. A thermal sub-unit with a switch (1) and a magnetic sub-unit with coil (7) swing the mechanism to open the contact during abnormal raise of current. Convector (5) is crossed by the current sent on the line. The switch and the convector are placed in a case such that the switch is in a heat flow from the convector. The convector is formed of conductor in conductive sheet cut and folded along geometry to increase length of the conductor in a space. The conductor is placed against and close to the switch.

Description

La présente invention concerne un dispositif de déclenchement thermique pour appareil électrique de protection de ligne de type disjoncteur. De tels appareils comportent classiquement dans un boîtier isolant :

  • au moins une paire de contacts respectivement fixe et mobile ;
  • un mécanisme à serrure d'ouverture et de fermeture des contacts coopérant avec une manette de commande ;
  • un sous-ensemble thermique à bilame et un sous-ensemble magnétique à bobine aptes à faire basculer le mécanisme à serrure en vue de l'ouverture des contacts en cas d'élévation anormale du courant ; et
  • des dispositifs de raccordement d'entrée et de sortie de l'appareil électrique à au moins une ligne.
The present invention relates to a thermal tripping device for circuit breaker type electrical protection device. Such devices conventionally comprise in an insulating housing:
  • at least one pair of contacts respectively fixed and mobile;
  • a lock mechanism for opening and closing the contacts cooperating with a control handle;
  • a bimetallic thermal subassembly and a coil magnetic subassembly adapted to swing the lock mechanism for opening the contacts in the event of abnormal current rise; and
  • devices for connecting the input and output of the electrical apparatus to at least one line.

L'invention concerne plus particulièrement des disjoncteurs de petit calibre, pour lesquels les dispositifs thermiques sont en général constitués d'un bilame non traversé par le courant, et d'un fil chauffant enroulé autour du bilame et parcouru par le courant de la ligne.The invention relates more particularly to small circuit breakers, for which the thermal devices are generally constituted by a bimetallic strip without current flow, and a heating wire wound around the bimetallic strip and traversed by the current of the line.

Une telle configuration présente un certain nombre d'avantages, au titre desquels on peut citer la robustesse de la fonction thermique en présence de faibles courants : le fil chauffant permet en effet d'utiliser un bilame suffisamment épais pour développer la force nécessaire au déclenchement du mécanisme d'ouverture et de fermeture des contacts.Such a configuration has a number of advantages, under which we can cite the robustness of the thermal function in the presence of weak currents: the heating wire makes it possible to use a bimetallic thick enough to develop the force required to trigger the mechanism for opening and closing contacts.

Cette structure offre également une compacité remarquable, car le fil chauffant est directement enroulé autour du bilame, et n'occupe pas un espace spécifique au voisinage de celui-ci.This structure also offers a remarkable compactness, because the heating wire is directly wound around the bimetallic strip, and does not occupy a specific space in the vicinity of it.

Toutefois, le fil chauffant ayant une impédance élevée en particulier due à sa petite section, il atteint rapidement sa température de fusion lorsqu'il est traversé par de hauts courants, par exemple en cas de court-circuit. Il s'agit d'une limitation pénalisante si le pouvoir de coupure recherché pour l'appareil électrique est élevé. Par ailleurs, une telle solution n'est pas favorable en termes d'industrialisation dans l'hypothèse d'une fabrication manuelle, car elle impose de souder le fil chauffant.However, the heating wire having a high impedance in particular due to its small section, it quickly reaches its melting temperature when it is crossed by high currents, for example in case of short circuit. This is a disadvantageous limitation if the breaking power sought for the electrical apparatus is high. Moreover, such a solution is not favorable in terms of industrialization in the case of manual manufacture, because it requires soldering the heating wire.

La présente invention se propose de remédier à ces inconvénients, tout en conservant les avantages précités. En d'autres termes, la configuration mise en oeuvre dans le cadre de la présente invention présente une robustesse et une compacité du même ordre que celles conférées par la solution à fil chauffant, en améliorant dans le même temps de manière importante la tenue en coupure.The present invention proposes to overcome these disadvantages, while maintaining the aforementioned advantages. In other words, the configuration implemented in the context of the present invention has a robustness and compactness of the same order as those conferred by the heating wire solution, while at the same time significantly improving the breaking strength. .

De façon connue, comme cela est par exemple décrit dans le document EP 0 143 022 , le sous-ensemble thermique de l'invention comporte un bilame et des moyens de convection thermique parcourus par le courant véhiculé sur une ligne, le bilame et les moyens de convection thermique étant disposés dans le boîtier de telle sorte que le bilame se trouve dans le flux de chaleur émis par les moyens de convection.In known manner, as described for example in the document EP 0 143 022 , the thermal subassembly of the invention comprises a bimetallic strip and thermal convection means traversed by the current carried on a line, the bimetallic strip and the thermal convection means being arranged in the casing so that the bimetal is in the heat flow emitted by the convection means.

Dans l'hypothèse de l'invention, non seulement le moyen de chauffage mais également le bilame sont parcourus par le courant véhiculé sur la ligne, ce qui n'est pas le cas dans les solutions utilisées dans les disjoncteurs de petit calibre traditionnels, dans lesquels seul le fil enroulé autour du bilame véhicule du courant.In the case of the invention, not only the heating means but also the bimetallic strip are traversed by the current carried on the line, which is not the case in the solutions used in traditional small circuit breakers, in which only the wire wound around the bimetallic carrier of the current.

L'objectif de l'invention est d'optimiser les configurations obéissant à ce principe.The objective of the invention is to optimize the configurations obeying this principle.

A cet effet, à titre principal, le dispositif de déclenchement thermique de l'invention se caractérise en ce que les moyens de convection thermique sont constitués d'un conducteur en tôle conductrice découpée et pliée selon une géométrie visant à rendre la longueur du conducteur la plus grande possible dans un espace donné, ledit conducteur étant placé en face et à proximité du bilame.For this purpose, primarily, the thermal tripping device of the invention is characterized in that the thermal convection means consist of a conductive sheet metal conductor cut and folded according to a geometry intended to make the length of the conductor largest possible in a given space, said conductor being placed in front and near the bimetallic strip.

L'une des idées à la base de l'invention est, en même temps que de fournir un chauffage indirect du bilame, d'augmenter l'impédance du moyen de chauffage, d'où l'augmentation de la longueur du conducteur, ce qui conduit à protéger le bilame et corollairement à augmenter les possibilités de choix pour celui-ci : il peut en particulier être choisi de plus grande impédance, présentant alors une déflection spécifique plus importante que dans une architecture traditionnelle. L'appareil est de plus rendu plus limiteur, ce qui conduit à diminuer les contraintes thermiques lors des coupures et à préserver encore le bilame.One of the basic ideas of the invention is, at the same time as providing indirect heating of the bimetal, to increase the impedance of the medium. heating, hence the increase in the length of the conductor, which leads to protect the bimetallic and corollary to increase the possibilities of choice for it: it can in particular be chosen higher impedance, then having a deflection specific more important than in a traditional architecture. The device is also made more limiting, which leads to reduce thermal stress during cuts and to further preserve the bimetallic strip.

La longueur du moyen de convection thermique participe d'une part à l'un des objectifs initiaux du système de l'invention, à savoir le chauffage de l'air environnant de manière à avoir un impact correct sur le bilame, et d'autre part remplit un rôle dans la maîtrise de l'impédance, et par conséquent du pouvoir de coupure.The length of the thermal convection means takes part, on the one hand, in one of the initial objectives of the system of the invention, namely the heating of the surrounding air so as to have a correct impact on the bimetallic strip, and on the other hand part plays a role in the control of impedance, and consequently the power of cutoff.

En pratique, les moyens de convection thermique sont constitués d'une portion centrale d'allure plane située en face du bilame et de deux pattes d'extrémité reliées respectivement à une tresse issue du bilame et à une extrémité du conducteur bobiné.In practice, the thermal convection means consist of a central portion of plane shape located opposite the bimetal and two end lugs respectively connected to a braid from the bimetal and one end of the wound conductor.

C'est cette portion centrale qui dispose à titre principal de la géométrie permettant d'allonger, le cas échéant, le conducteur.It is this central portion that has the main geometry to extend, if necessary, the driver.

Ainsi, selon une possibilité, la portion centrale se présente sous forme d'un crénelage allongé.Thus, according to one possibility, the central portion is in the form of an elongated aliasing.

Dans cette hypothèse, les espacements entre les conducteurs étant très réduit, le conducteur occupe la quasi-totalité d'un rectangle en adoptant la configuration lui permettant de se déployer sur la plus grande longueur possible.In this hypothesis, the spacings between the conductors being very small, the driver occupies almost all of a rectangle by adopting the configuration allowing it to deploy on the greatest possible length.

Selon une première possibilité, les moyens de convection thermique sont placés en série avec le bilame.According to a first possibility, the thermal convection means are placed in series with the bimetallic strip.

Alternativement, ces moyens de convection thermique et le bilame peuvent être placés en parallèle.Alternatively, these thermal convection means and the bimetal can be placed in parallel.

Dans les deux cas, la disposition relative des moyens de convection et du bilame dans l'espace doit être telle que ledit bilame puisse être chauffé par la circulation de l'air réchauffé obtenu à l'aide des moyens de convection.In both cases, the relative disposition of the convection means and the bimetallic strip in space must be such that said bimetal strip can be heated by the circulation of the heated air obtained using the convection means.

Les moyens de convection thermique et le bilame, formant un ensemble, sont en pratique connectés entre une borne d'un des dispositifs de raccordement à une ligne et un des contacts fixe ou mobile.The thermal convection means and the bimetallic strip, forming an assembly, are in practice connected between a terminal of one of the connection devices to a line and one of the fixed or mobile contacts.

Selon une configuration possible, ils sont plus précisément disposés entre une borne et la bobine du sous-ensemble magnétique, à la sortie de laquelle est raccordé le contact fixe.According to a possible configuration, they are more precisely arranged between a terminal and the coil of the magnetic subassembly, at the output of which is connected the fixed contact.

Cette configuration ne représente cependant qu'un des exemples de structures possibles, sachant qu'il peut également exister des solutions dans lesquelles le bilame est inséré entre une borne et le contact mobile.This configuration, however, is only one of the examples of possible structures, knowing that there may also exist solutions in which the bimetal is inserted between a terminal and the movable contact.

Plus précisément encore, le bilame est soudé à ladite borne, l'extrémité libre dudit bilame étant raccordée aux moyens de convection thermique par une tresse conductrice, une patte d'extrémité des moyens de convection étant soudée à la bobine.More specifically, the bimetal is welded to said terminal, the free end of said bimetal strip being connected to the thermal convection means by a conductive braid, an end lug of the convection means being welded to the coil.

Par ailleurs, les moyens de convection thermique sont de préférence logés dans une portion du boîtier isolant de l'appareil électrique munie de parois délimitant un espace restreint favorisant le chauffage du bilame par convection.Moreover, the thermal convection means are preferably housed in a portion of the insulating housing of the electrical apparatus provided with walls delimiting a restricted space favoring the heating of the bimetal by convection.

La convection étant basée sur des déplacements de flux d'air, la gestion de ces flux dans un espace confiné permet d'améliorer l'aptitude au chauffage résultant des moyens de convection.Convection being based on displacements of air flow, the management of these flows in a confined space makes it possible to improve the heatability resulting from the convection means.

L'invention va à présent être décrite plus en détail, en référence aux figures annexées, pour lesquelles :

  • la figure 1 représente, en vue perspective, l'association bilame / moyen de convection entre une borne de raccordement à une ligne et la bobine d'un sous-ensemble magnétique ; et
  • la figure 2 montre, en section, un disjoncteur équipé d'un dispositif de déclenchement thermique selon l'invention.
The invention will now be described in more detail, with reference to the appended figures, for which:
  • the figure 1 represents, in perspective view, the bimetallic / convective means combination between a connection terminal to a line and the coil of a magnetic subassembly; and
  • the figure 2 shows, in section, a circuit breaker equipped with a thermal tripping device according to the invention.

En référence à la figure 1, le bilame (1) est soudé à une borne (2) à l'une de ses extrémités. L'autre extrémité est raccordée par le biais d'une tresse (3) à une patte d'extrémité (4) d'un convecteur (5) dont l'autre extrémité est équipée d'une seconde patte (6) permettant son raccordement à la bobine (7) d'un sous-ensemble magnétique, équipée en sortie d'un contact fixe (8).With reference to the figure 1 bimetal (1) is welded to a terminal (2) at one of its ends. The other end is connected by means of a braid (3) to an end lug (4) of a convector (5) whose other end is equipped with a second lug (6) allowing its connection to the coil (7) of a magnetic subassembly, equipped at the output of a fixed contact (8).

Cet ensemble, qui intègre la fonction thermique et la fonction magnétique, est prévu pour équiper un disjoncteur tel que représenté en figure 2. La borne (2) coopère en l'espèce avec un dispositif de raccordement à cage (9) et vis (10). Elle coulisse dans la cage (9 dans la direction de l'axe de rotation de la vis (10). L'ensemble constitué du bilame (1), de la tresse (3), des pattes d'extrémité (4, 6) et du convecteur (5) est disposé dans une zone du boîtier (B) lui procurant un espace relativement confiné favorisant la convection de l'air. Cet espace est schématiquement représenté par les hachures (11). Le sous-ensemble magnétique (12) participe d'ailleurs à ce confinement, sur la droite du dispositif de l'invention.This assembly, which integrates the thermal function and the magnetic function, is intended to equip a circuit breaker as shown in FIG. figure 2 . The terminal (2) cooperates in this case with a cage connection device (9) and screw (10). It slides in the cage (9 in the direction of the axis of rotation of the screw (10) .The assembly consisting of the bimetallic strip (1), the braid (3), the end lugs (4, 6) and the convector (5) is disposed in an area of the housing (B) providing a relatively confined space for convection of air, which space is schematically represented by the hatching (11) The magnetic subassembly (12) besides participating in this confinement, on the right of the device of the invention.

L'air chauffé par le convecteur, circulant dans cette zone, permet d'élever la température du bilame (1), de telle sorte que celui-ci subisse une déflection lui permettant d'agir sur le mécanisme de déclenchement à serrure du disjoncteur.The air heated by the convector, circulating in this zone, makes it possible to raise the temperature of the bimetallic strip (1), so that it undergoes a deflection enabling it to act on the latch release mechanism of the circuit breaker.

Les autres composants et fonctions dans le boîtier (B) du disjoncteur n'ayant pas d'incidence sur l'invention, ils ne sont pas décrits en détail dans ce texte.The other components and functions in the case (B) of the circuit breaker does not affect the invention, they are not described in detail in this text.

La configuration géométrique des moyens de convection, telle qu'apparaissant en figure 1, est par exemple la suivante : un crénelage allongé (5), disposé en face du bilame (1), permet une production de chaleur impactant directement ledit bilame (1).The geometric configuration of the convection means, as appearing in figure 1 is, for example, the following one: an elongated aliasing (5), arranged in front of the bimetallic strip (1), allows a production of heat directly impacting said bimetallic strip (1).

Le convecteur (5), situé à proximité du bilame (1), chauffe l'air ambiant et réalise par conséquent un chauffage indirect du bilame (1). La compacité des moyens de convection (5) est notamment obtenue par cette géométrie plane, ensuite facilement intégrable dans l'épaisseur du disjoncteur (voir en figure 2). Cette géométrie favorise les échanges thermiques avec l'air ambiant. Une telle géométrie peut enfin avoir une incidence directe sur la production de chaleur du convecteur (5), puisqu'elle permet d'ajuster facilement la longueur de celui-ci.The convector (5), located near the bimetallic strip (1), heats the ambient air and therefore indirectly heats the bimetallic strip (1). The compactness of the convection means (5) is in particular obtained by this planar geometry, which can then be easily integrated into the thickness of the circuit breaker (see FIG. figure 2 ). This geometry favors heat exchanges with the ambient air. Such a geometry can finally have a direct impact on the heat production of the convector (5), since it allows to easily adjust the length thereof.

Le choix du matériau (cuivre, laiton, acier) permet également d'ajuster l'apport de chaleur.The choice of material (copper, brass, steel) also makes it possible to adjust the heat input.

Selon le pouvoir de coupure désiré, et donc la résistance du convecteur (5), on calcule la section de celui-ci en fonction de la nature du matériau. Une fois cette section minimale obtenue, on peut contrôler la production de chaleur en ajustant la longueur du convecteur (5).According to the desired breaking capacity, and therefore the resistance of the convector (5), the section of the latter is calculated as a function of the nature of the material. Once this minimum section is obtained, the heat production can be controlled by adjusting the length of the convector (5).

Claims (8)

  1. A thermal trip device for an electrical line protection apparatus, comprising inside an insulating case:
    - at least one pair of respectively fixed and mobile contacts;
    - a lock mechanism for opening and closing the contacts cooperating with a control arm;
    - a bimetal thermal sub-assembly (1) and a magnetic sub-assembly (12) having a coil (7), adapted for switching the lock mechanism so as to open the contacts in case of an abnormal increase in current; and
    - input and output devices for connecting the electric apparatus to at least one line;
    - thermal convection means (5) through which flows the current conveyed on a line, the bimetal (1) and the thermal convection means (5) being arranged inside the case (B) so that the bimetal (1) is located within the heat flow emitted by the convection means (5);
    the thermal convection means consisting of a conductor (5) of cut out and folded conductive sheet metal,
    characterized in that the conductor (5) has a center portion made as an elongated serration, said conductor (5) being placed opposite and near the bimetal (1).
  2. The thermal trip device according to the preceding claim, characterized in that the thermal convection means (5) consist of said center portion having a planar appearance, located opposite the bimetal (1), and of two end tabs (4, 6) respectively linked to a braid (3) coming from the bimetal (1) and to one end of the coiled conductor.
  3. The thermal trip device according to any of the preceding claims, characterized in that the thermal convection means (5) are placed in series with the bimetal (1).
  4. The thermal trip device according to any of claims 1 to 2, characterized in that the thermal convection means (5) and the bimetal (1) are placed in parallel.
  5. The thermal trip device according to any of claims 3 and 4, characterized in that the thermal convection means (5) and the bimetal (1) are connected between a terminal (2) of one of the devices for connection to a line and one of the fixed or mobile contacts.
  6. The thermal trip device according to the preceding claim, characterized in that the thermal convection means (5) and the bimetal (1) are connected between a terminal (2) of one of the devices for connection to a line and the coil (7) of the magnetic sub-assembly (12) at the output of which the fixed contact (8) is connected.
  7. The thermal trip device according to the preceding claim, characterized in that the bimetal (1) is welded to said terminal (2), the free end of said bimetal (1) being connected to the thermal convection means (5) by a conductive braid (3), with an end tab (6) of the convection means being welded to the coil (7).
  8. The thermal trip device according to any of the preceding claims, characterized in that it is housed in a portion of the case (B) insulating the electrical apparatus, provided with walls delimiting a restricted space (11) facilitating convection heating of the bimetal (1).
EP08305864A 2007-11-29 2008-11-28 Thermal trip device for electrical line-protection device Active EP2065913B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0708350A FR2924531A1 (en) 2007-11-29 2007-11-29 THERMAL RELEASE DEVICE FOR ELECTRIC LINE PROTECTION APPARATUS

Publications (2)

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EP2065913A1 EP2065913A1 (en) 2009-06-03
EP2065913B1 true EP2065913B1 (en) 2011-06-22

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EP08305864A Active EP2065913B1 (en) 2007-11-29 2008-11-28 Thermal trip device for electrical line-protection device

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EP (1) EP2065913B1 (en)
AT (1) ATE514176T1 (en)
ES (1) ES2367764T3 (en)
FR (1) FR2924531A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9417754B2 (en) 2011-08-05 2016-08-16 P4tents1, LLC User interface system, method, and computer program product

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3471809D1 (en) * 1983-10-21 1988-07-07 Merlin Gerin Thermal and magnetic circuit breaker tripping mechanism
DE4300909C2 (en) * 1993-01-15 1997-02-06 Abb Patent Gmbh Thermal release, especially for a circuit breaker

Also Published As

Publication number Publication date
ATE514176T1 (en) 2011-07-15
EP2065913A1 (en) 2009-06-03
ES2367764T3 (en) 2011-11-08
FR2924531A1 (en) 2009-06-05

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